Locomotive-headlight.



Um'ra sfraras PATENTT OFFICE.

EDGAR 'A. EIYWARDS, OF UINCIN'NATL OHO, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO h'lETROPOl'iITAN T RUCT o): SAVINGSBANK, TRUSTEE,

A CORPORATION OF lLLlNOlS.

'LOCOMOTlVE-HEADLEGHT.

specification of Letters 1 atent.

``Patented Feb. 13, 1906.

Application filed November 25,1901. brial No. 83,535.

.lights, of which the following is a specificatron.

My invention relates to locoinotive-headlights and to that class of heallights--such, for instance, as is illustrated in Samuel H. HarringtonfsLetters Patent, No. 495,938, dated April 18, 1893 `-in which asignal-light is projected upward from the hcadlight, so as to signal theapproach of a train from a distance when the usual horizontal lightcould not, in conseque-nc'e of curvaturcs of the road and interveningobjects, 'c., bc perceived'; and my invention consists in proviiding thecasing of the headlight with two intersecting reflectors, one of whichwill throw certain light-rays upward and the other will throwcertainlight-rays forward, as fully set forth' hereinafter and asillustrated in the accompanying drawings, in which- Figure 1 is alongitudinal section of a locomotive-headlight, illustrating myimprovement; and Fig. 2 is a front view.

The casing Aof the headlight issuitably constructcd so as to provide anopening at the front, as well as one at the to the saidopenings being'covered by glass p ates a and Z), as shown. Within the'casing' isarranged a paraholoidal reflector C of the usual construction, and atthe focus of this rcfiector is the flaine of the lamp, which maybe ofany suitable character, but as shown is an arclainp, the rellector (Jbeing so constructed as to throw the light-rays forward through thefront oponiiue` 'v in a substantially horizontal direction. Within thecasing A is arranged a second reficctor J', of the same shape as thercfiector (J; hut it is so arranged as to have the same focus as thereflector C. To make this arrangement, it becomes necessary to cut awayeach of the refiectors so that they meet upon a plane 8 assing throughthe said focus, forming a imited opening between the interiors of theparabolas, the

shape of which sbest shown by the outline t in Fig. 2.

thrown upward through .the' ofiening at the top of the casing- There aret erefore within the casing A two similar reflectors, one throW-.

ing a portion ofthe light-rays forward and the other throwing a portionof the light-ra vs upward, eachreceiving its rays fromt e same lamp,which is arrange'd in a focus common to both. i

lt will be seen that when two refieotors of the Character descrihedidtersect each other there is hut a comparatively small ortion of Thereflecto'r C' also' receives the; rays of light from the lamp B, andthese`are each i'efiector cut away, so that a arge portion of eachreflector will receive and project the light-rays 'through the oipositeo ening, while both reflectors are com same casxng and rotected from theweather med wit lin the and 'receive their ight from a common source;` i

Without limiting myself to the precise construction and arrangement ofparts shown, I claiin as my inventionff 1. In a locoinotive-headlight,the combination of a casing open at both the front and' top, and twoiiitersecting paraboloidal reflectors having a common focus andarrangefd one to rel'lcct the light from said focus forward and theother upward, substantially as set forth.

2. The combination with lthe lamp zof a locomotivc-headlight, ofaparaboloidal refiector, the focus of which corresponds With the lightof said lamp and arrang'edv to project' the light-rays forward, and asecond paraboloi'dal refiector int'ersecting the first, having the samefocus and arranged to project 'the lightrays ulpward, substantially asset/forth.

3. he combination with the lamp of a lcomotive-headlight, of apara'boloidal reflector, the focus of which corresponds with the` lightof said lamp and arranged to project the light-rays forward, a secondparaboloidal re-` flector intersectingthe first, having the same focusand arranged to project the light-rays upward, and a casing with end andtop openings for the assage of the light-rays forward and upwar and'transparent coverins for said openings, substantially ns set `'fort' 4.The combination in a locomotve-head- 1 In testimoy 'Whe'reof` haveslgned my light, 'of a casing with openlngs at the top and front, andntersecting pambolodal reflectors having a common focus arranged to pro-5 'ect light-rays forward and upward, and a.

amp arranged to produoe the fiame at said focus, substantially as setforth.

name to this specification in the presence of two subscrlblng wltnesses.

EDGAR A. EDWARDS.

Witnesses:

H. M. GILLMAN, Jr., W. CLARENOE DUVALL.

